2523561 has 8 divisors (see below), whose sum is σ = 3541920. Its totient is φ = 1593792.

The previous prime is 2523557. The next prime is 2523569. The reversal of 2523561 is 1653252.

2523561 = 26² + 27² + ... + 196².

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2523561 - 2² = 2523557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2523569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22080 + ... + 22193.

It is an arithmetic number, because the mean of its divisors is an integer number (442740).

2^2523561 is an apocalyptic number.

It is an amenable number.

2523561 is a deficient number, since it is larger than the sum of its proper divisors (1018359).

2523561 is a wasteful number, since it uses less digits than its factorization.

2523561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44295.

The product of its digits is 1800, while the sum is 24.

The square root of 2523561 is about 1588.5720002568. The cubic root of 2523561 is about 136.1459110179.

It can be divided in two parts, 2523 and 561, that multiplied together give a triangular number (1415403 = T₁₆₈₂).

The spelling of 2523561 in words is "two million, five hundred twenty-three thousand, five hundred sixty-one".